For me, absolutely not relevant to play at 4K resolution, the gain from 1440p is minimal at best and the cost to reach acceptable FPS at 4K is just not worth the trouble/money/electricity consumption. 1440p is the best resolution for gamers IMHO. Plenty of details on a 27" monitor, plenty of FPS and good quality IPS panels that reach insane framerates, or VA now with Samsung screens. What's all the hype around 4K, if it's not to sell more screens and graphic cards? My 1080p works great on my MSI MAG274QRF-QD 1440p, I reach 100 FPS+ on the vast majority of games, except Cyberpunk and the likes of course. The sweet spot for a 1440p is a 3070 Ti or at most a 3080. No good screens that reach 165 FPS at 4K for the time being, or at least at acceptable prices. The MSI accepts 4K downscaling, so it's an ok compromise for a PS5, or buy an OLED 48" LG TV...
Upgrading the monitor is, for now, the best solution, as it allows to take advantage of the performances of your GC instead of clamping to 60 FPS. With a high refresh rate screen: instant upgrade to 100+ FPS at a fraction of the cost of a GPU!